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Cesium and strontium extraction using a mixed extractant solvent including crown ether and calixarene extractants

United States Patent

November 6, 2007
View the Complete Patent at the US Patent & Trademark Office
Idaho National Laboratory - Visit the Technology Transfer and Commercialization Office Website
A mixed extractant solvent including calix[4]arene-bis-(tert-octylbenzo)-crown-6 ("BOBCalixC6"), 4',4',(5')-di-(t-butyldicyclo-hexano)-18-crown-6 ("DtBu18C6"), and at least one modifier dissolved in a diluent. The mixed extractant solvent may be used to remove cesium and strontium from an acidic solution. The DtBu18C6 may be present from approximately 0.01 M to approximately 0.4M, such as from approximately 0.086 M to approximately 0.108 M. The modifier may be 1-(2,2,3,3-tetrafluoropropoxy)-3-(4-sec-butylphenoxy)-2-propanol ("Cs-7SB") and may be present from approximately 0.01M to approximately 0.8M. In one embodiment, the mixed extractant solvent includes approximately 0.15M DtBu18C6, approximately 0.007M BOBCalixC6, and approximately 0.75M Cs-7SB modifier dissolved in an isoparaffinic hydrocarbon diluent. The mixed extractant solvent may form an organic phase in an extraction system that also includes an aqueous phase. Methods of extracting cesium and strontium as well as strontium alone are also disclosed.
Meikrantz; David H. (Idaho Falls, ID), Todd; Terry A. (Aberdeen, ID), Riddle; Catherine L. (Idaho Falls, ID), Law; Jack D. (Pocatello, ID), Peterman; Dean R. (Idaho Falls, ID), Mincher; Bruce J. (Idaho Falls, ID), McGrath; Christopher A. (Blackfoot, ID), Baker; John D. (Blackfoot, ID)
Battelle Energy Alliance, LLC (Idaho Falls, ID)
10/ 808,039
March 23, 2004
GOVERNMENT RIGHTS The United States Government has rights in the following invention pursuant to Contract No. DE-AC07-99ID13727 between the U.S. Department of Energy and Bechtel BWXT Idaho, LLC.